APA (7th ed.) Citation

Nuttall, C. E., Anderson, S. D., & Shepherd, J. P. The past perfect tense: (Including contrast with past simple).

Chicago Style (17th ed.) Citation

Nuttall, C. E., S. D. Anderson, and J. P. Shepherd. The Past Perfect Tense: (Including Contrast with Past Simple). London.

MLA (9th ed.) Citation

Nuttall, C. E., et al. The Past Perfect Tense: (Including Contrast with Past Simple).